Locomotive frame



' portion 3 of the frame.

' GEORGE E PARKS, or DETROIT, MICHIGAN.

LOCOMOTIVE FRAME.

Application led August 21, 19222. Serial No. 583,218.

I To all 'whom t may concern.'

Be it known that I, GEORGE E. PARKS, a citizen of the United States, residing at Detroit, county of Wayne, and State of Michigan, have invented a certain new and useful Improvement in Locomotive,I Frames, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this application. y

My invention relates to railroad rolling stock and consists in an improved locomotive frame construction especially adapted for use in one-piece cast frames. It is customary to form the top and bottom rail members and the pedestal jaw members integrally of practically rectangular section, uniform 'in areas in an attempt to secure uniform strength. After the casting is produced, the frame is drilled horizontally and vertically at different points to provide for the attachment of various other locomotive parts to the frame. This perforation of the frame reduces the cross sectional area so that the uniform strength for which the casti is designed is not present in the iinishe roduct when it is assembled with the other ocomotive parts.

The o'bject of my invention is to produce a frame, the cross sections of which at various points will vary in shape and overall height and depth, but will be substantially constant in 'cross sectional area where desired, without including the open spaces produced by the drillingof bolt and rivet holes, etc.

In the accompanyin' drawings, which illustrate a selected em odiment of my invention,

Figure 1 is a side elevation of my improved locomotive frame.

Figures 2 to'13 inclusive are transverse sections taken on the lines 2-2, 3--3, etc., of Figure 1.

The lefthand portion of the frame illustrated yis provided with an upper rail 1 which extends over the edestal openings and with a lower rail 2 which extends between the pedestal openings and at theright merges with rail 1 to form the c linder connecting hat ortion of rail 1 over the pedestal openings 1s rectangular in cross section, as shown in Figure 2. The

portion between the rail Openings is of inverted U-scction and the inclined portion at the right of the pedestal opening is similarly shaped but provided with additional flanges, where necessary, to maintain the desired cross sectlonal area, which is substantially constant at these different points.

The lower rail 2 is U-shaped in cross section and merges into the vertical portions 3 at the sides of the pedestal openings without substantial change in shape or sectional area. It will be noted that various horizontal openings 4 and vertical o enings 5 are provided in the different wal s of both of these rails which, if drilled through a sectlon otherwise-unchanged, would reduce the area andstrength at different points. To compensate for this reduction, the walls of the casting are' thickened at thesev points throughout their length or by suitable bosses so that the cross sectional area is not affected'. In other words, the area of the figures shown in Figures 3 and llis substantially equal although the contour is the same and the openings therethrough are at. right angles to each other. By locating the bosses surrounding the openings 4 and 5 in these two figures on the inside faces of the casting walls the exterior contour'is not affected and the appearance and outside clearance of a frame is the same as in the ordinary con- Strsuliiiiini F 7 d h 'ar igures5,6, an 8s owthe different sliapin and perforation of lower rail 2 and vertica portion 3 without substantial variation in cross section area. v 1

At the right of the pedestal openings, the upper rail is increased in sectional area and a depending ange 6 is rovided for a short distance as shown in 1 and 9. Immediately beyond this ortion of the casting, an upstandi-ng flange is provided in place ofliiange 6 without varying the area of the ral Where the rails are united in the c linder connecting portion ofthe frame, t e sectional area is greater than either rail 1,/ or

tion of the adjacent portions of the frame thickness of the Wall can be varied to maintain the sectional area as illustrated in the accompanying drawings.

l contain late such modifications in the contour an cross section of the frame as ma be required for dil'erent installations, wit 'out departing from the spirit of my invention as expressed in the appended claims.

I claim:

1. A one-piece cast locomotiveframe having pedestal openings and including a single rail portion over the pedestal openings and spaced parallel rail portions intermediate the pedestal openings, said single rail portion being box-shape in cross section and said intermediate rail portions being U-shape in the casting varying in di'erently shaped cross sections so that the sectional areas of said box and U-shaped portions are substantially equal.

2. A one-piece cast locomotive frame having pedestal openings and including a single rail portion over the pedestal openings and 25 spaced rail portions intermediate the pedestal openings, said single rail portion and said intermediate rail portions being of different shaped cross sections, the walls of said cross sections varying 'in size so that their sectional areas are substantially equal. ln testimony whereof I hereunto aflix my signature this 11th da of Au 1922.

G ORGE PARKS.v 

